Deploying Mods
You have to get within 40 metres of a portal to deploy mods - the same distance as hacking or deploying resonators.
Each portal has four mod slots.
You can fill two mod slots. You can’t fill all four slots yourself! You need team-mates to fill the other slots.
No take-backs: You can’t remove mods; nor can you upgrade existing mods. Once you put a mod on a portal, it will stay until the enemy team knocks it off! See: Destroying Mods.